Krystal Here! I have posted a download link to this wiki. You can download this wiki for future preferences. Just look at the discussion page. it should be there. (:
Bryan, did you really make your username therealrigocarvajal? That's cool. Anyways, its rigo. I'm on government and I play basketball. Kbye. I love Jose, Jose didn't write this <33333
Hey guys, it's Bryan Quibol here, I'm pretty sure Ms. Couling asked us to write a little bit about ourselves on here so I'm doing it! I play basketball and I like pizza! There ya go!
Scientific Notation
What? -way of expressing really big numbers or really small numbers -allows to compare numbers without losing track of all the zeros Why? -convert very large/very small numbers into Scientific Notation to express them in a more concise form -converted numbers can be used in a computation with far greater ease Different Parts: Base & A power of 10 n x 10^x -the BASE can only be a number greater than 1 and less than 10 Standard Form to Scientific Notation step 1: place decimal point so that there's one non-zero digit to the left of the decimal point step 2: count the number of decimal places the decimal point has "moved" from the original number; this will be the exponent on the 10 step 3: if the original number was less than 1, then the exponent is negative; if it is greater than 1, the exponent is positive Scientific Notation to Standard Form step 1: move the decimal point to the right for positive exponent of 10 step 2: move the decimal point to the left for negative exponent of 10 *USE ZEROS TO FILL IN PLACES*
SCIENTIFIC NOTATION ON A CALCULATOR
Step 1: Punch the number (the digit number) into your calculator Step 2: Push the EE or EXP button. Do NOT use the x (times) button!! (The EE=x10) Step 3: Enter the exponent number. Use the +/- button to change its sign.
An Introduction to measurement study guide for period 5 Significant Figure Rules:
·All non-zero digits are significant.
·The digits are absolutely certain, plus one more.
·0’s in the middle of a number are always significant.
·0’s in the front of a number areNEVERsignificant.
·0’s at the end of a number are SOMETIMES significant.
·If a decimal point is present, 0’s at the end ARE significant.
·If a decimal point is NOT present__, 0’s at the end are NOT significant.
· Use scientific notation so you do not chop off number when asked to write the answer to a certain number of significant figures.
Significant Figure Calculations:
Multiplying & Dividing:
When carrying out multiplication of numbers or measurements your answer must be written to the lowest number of significant figures that were in the problem
3g x 295 g = 900 g
Adding & Subtracting:
When adding or subtracting you need to give your answer to the lowest number of places past the decimal that were in the problem
23.6 mL – 16.1218 mL = 7.5 mL
Combining:
The multiplication / division rule is the KING!
If you have to carry out division or multiplication and then addition or subtraction give your answer to the lowest number of sig figs that were in the problem.
The standard unit of length in the metric system is the meter. Other units of length and their equivalents in meters are as follows: 1 millimeter = 0.001 meter 1 centimeter = 0.01 meter 1 decimeter = 0.1 meter 1 kilometer = 1000 meters
We symbolize these lengths as follows: 1 millimeter = 1 mm 1 centimeter = 1 cm 1 meter = 1 m 1 decimeter = 1 dm 1 kilometer = 1 km
The standard unit of volume in the metric system is the liter. One liter is equal to 1000 cubic centimeters in volume. Other units of volume and their equivalents in liters are as follows:
1 milliliter = 0.001 liter
1 centiliter = 0.01 liter
1 deciliter = 0.1 liter
1 kiloliter = 1000 liters
From these units, we see that 1000 milliliters equal 1 liter; so 1 milliliter equals 1 cubic centimeter in volume. We symbolize these volumes as follows:
1 milliliter = 1 ml
1 centiliter = 1 cl
1 deciliter = 1 dl
1 liter = 1 l
1 kiloliter = 1 kl
The standard unit of mass in the metric system is the gram. Other units of mass and their equivalents in grams are as follows: 1 milligram = 0.001 gram 1 centigram = 0.01 gram 1 decigram = 0.1 gram 1 kilogram = 1000 grams
We symbolize these masses as follows: 1 milligram = 1 mg 1 centigram = 1 cg 1 decigram = 1 dg 1 gram = 1 g 1 kilogram = 1 kg
Mass
(“weight”)*
milligram
mg
1000 mg
=
1 g
gram
g
kilogram
kg
1 kg
=
1000 g
metric ton
t
1 t
=
1000 kg
And if you didn't like the information from above, here's this!
Direct and Indirect conversions:
Direct conversion is like Ounces to Pounds, where it's just one straightforward conversion.
Indirect conversion is where you have to convert it to something then convert it int something else to get your answer.
Like Grams to Ounces to Pounds.
-Units are very important when it comes to dimensional analysis. You have to make sure to always have the units. You must show your work because numbers by themselves mean nothing.
- Remember to always have correct sig figs.
- Conversion Process
- Step 1- Multiply to the right
- Step 2- Divide by the bottom number
- Step 3- Make sure to have correct amount of sig figs
P.S. MAKE SURE TO ALWAYS HAVE UNITS!!!!!!!
Practice problems:
Accuracy vs. Precision is a theory used in chemistry, presented by Mrs. Couling. Scientists aim for measurements to be both accurate and precise.
Accuracy: Accuracy refers to the measure of "rightness". By definition, accurate means "capable of providing a correct reading or measurement". A measurement is accurate if it correctly reflects the size of the thing being measured. Accuracy refers to how closely a measured value agrees with the correct value. Accuracy is correctness.
Precision: Precision refers to the measure of "exactness". By definition, precise means "repeatable, reliable, getting the same measurement each time". Precision refers to how closely individual measurements agree with each other. Precision is repeatability.
Note: See the following analogy of measurements to arrows at a target. See that the X's are where the five arrows hit the target.
Period 5 Chemistry pageMagnesium Oxide Lab
Michael Truong, John Hritz, Sonia Lee, Roxanne Eramelahttp://www.youtube.com/watch?v=IKGjLbpXtdY
The BEST Magnesium Oxide Lab Video. :D
with Bryan, Jose, Kristine, and Joe!
http://www.youtube.com/watch?v=ptUR3VWqJRc
Magnesium Oxide Lab Video. :D
with Rolando, Yvett, Serena, and Krystalhttp://www.youtube.com/watch?v=0oVHsWT5np8
Magnesium Oxide Lab Video!
by Carl, Nando, Clint, and JamesThe wiki wouldn't let us embed the video because the file was too big so we give you the youtube link to the video! :D
Enjoy!
Magnesium Oxide Lab <---CLICK
Magnesium Oxide Lab Video!
by Rigoberto, Michael E., Carlos, and EricThe wiki wouldn't let us embed the video because the file was too big so we give you the youtube link to the video! :D
Enjoy!
http://www.youtube.com/watch?v=V6aIgL9VIbs <---CLICK
_
OUR MAGNESIUM OXIDE LAB VIDEO!
BY: MATTHEW DO, JANA LEE, STEFANIE SAFLOR, DAVID RADICH
http://www.youtube.com/watch?v=4kj_NjtaEdo <----- CLICK THIS ONE
Magnesium Oxide Lab Video
-Kristia, Adriana, Austin & Nicole
http://www.youtube.com/watch?v=WZSzT2tOdGU
Magnesium Oxide Lab Video!
by Logan, Chris, Dana, and MyleThe wiki wouldn't let us embed the video because the file was too big so we give you the youtube link to the video! :D
Enjoy!
http://www.youtube.com/watch?v=flfpjTXSb1Q
Krystal Here! I have posted a download link to this wiki.
You can download this wiki for future preferences. Just look at the discussion page.
it should be there. (:
List of SI units
Length- meters
Volume- centimeters cubed
Temperature- Kelvin
Mass- kilograms
Substance- mole
Time- second
http://physics.nist.gov/ccu/Units/units.html
How to convert from celsius to Kelvin: http://www.ajdesigner.com/phptemperature/temperature_equation_convert_c_k.php
Bryan, did you really make your username therealrigocarvajal? That's cool. Anyways, its rigo. I'm on government and I play basketball. Kbye. I love Jose, Jose didn't write this <33333
Hey guys, it's Bryan Quibol here, I'm pretty sure Ms. Couling asked us to write a little bit about ourselves on here so I'm doing it! I play basketball and I like pizza! There ya go!
What?
-way of expressing really big numbers or really small numbers
-allows to compare numbers without losing track of all the zeros
Why?
-convert very large/very small numbers into Scientific Notation to express them in a more concise form
-converted numbers can be used in a computation with far greater ease
Different Parts:
Base & A power of 10
n x 10^x
-the BASE can only be a number greater than 1 and less than 10
Standard Form to Scientific Notation
step 1: place decimal point so that there's one non-zero digit to the left of the decimal point
step 2: count the number of decimal places the decimal point has "moved" from the original number; this will be the exponent on the 10
step 3: if the original number was less than 1, then the exponent is negative; if it is greater than 1, the exponent is positive
Scientific Notation to Standard Form
step 1: move the decimal point to the right for positive exponent of 10
step 2: move the decimal point to the left for negative exponent of 10
*USE ZEROS TO FILL IN PLACES*
SCIENTIFIC NOTATION ON A CALCULATOR
Step 1: Punch the number (the digit number) into your calculator
Step 2: Push the EE or EXP button. Do NOT use the x (times) button!! (The EE=x10)
Step 3: Enter the exponent number. Use the +/- button to change its sign.
An Introduction to measurement study guide for period 5
Significant Figure Rules:
Significant Figure Calculations:
- Multiplying & Dividing:
- When carrying out multiplication of numbers or measurements your answer must be written to the lowest number of significant figures that were in the problem
- 3g x 295 g = 900 g
- Adding & Subtracting:
- When adding or subtracting you need to give your answer to the lowest number of places past the decimal that were in the problem
- 23.6 mL – 16.1218 mL = 7.5 mL
- Combining:
- The multiplication / division rule is the KING!
- If you have to carry out division or multiplication and then addition or subtraction give your answer to the lowest number of sig figs that were in the problem.
- 5.46 mg x 3.2 mg + 1.59 mg = 19 mg (2sf)
Metric UnitsPrefixes (easy to remember!)
Prefixes of Metric Units
The standard unit of length in the metric system is the meter. Other units of length and their equivalents in meters are as follows:
1 millimeter = 0.001 meter
1 centimeter = 0.01 meter
1 decimeter = 0.1 meter
1 kilometer = 1000 meters
We symbolize these lengths as follows:
1 millimeter = 1 mm
1 centimeter = 1 cm
1 meter = 1 m
1 decimeter = 1 dm
1 kilometer = 1 km
The standard unit of volume in the metric system is the liter. One liter is equal to 1000 cubic centimeters in volume. Other units of volume and their equivalents in liters are as follows:
1 milliliter = 0.001 liter
1 centiliter = 0.01 liter
1 deciliter = 0.1 liter
1 kiloliter = 1000 liters
From these units, we see that 1000 milliliters equal 1 liter; so 1 milliliter equals 1 cubic centimeter in volume. We symbolize these volumes as follows:
1 milliliter = 1 ml
1 centiliter = 1 cl
1 deciliter = 1 dl
1 liter = 1 l
1 kiloliter = 1 kl
The standard unit of mass in the metric system is the gram. Other units of mass and their equivalents in grams are as follows:
1 milligram = 0.001 gram
1 centigram = 0.01 gram
1 decigram = 0.1 gram
1 kilogram = 1000 grams
We symbolize these masses as follows:
1 milligram = 1 mg
1 centigram = 1 cg
1 decigram = 1 dg
1 gram = 1 g
1 kilogram = 1 kg
Mass
(“weight”)*
milligram
mg
1000 mg
=
1 g
gram
g
kilogram
kg
1 kg
=
1000 g
metric ton
t
1 t
=
1000 kg
Another Website for reference:
Common Metric Measurements
A Youtube Video...
Video to the Basics of the Metric System
Dimensional Analysis:
Direct and Indirect conversions:
Direct conversion is like Ounces to Pounds, where it's just one straightforward conversion.
Indirect conversion is where you have to convert it to something then convert it int something else to get your answer.
Like Grams to Ounces to Pounds.
-Units are very important when it comes to dimensional analysis. You have to make sure to always have the units. You must show your work because numbers by themselves mean nothing.
- Remember to always have correct sig figs.
- Conversion Process
- Step 1- Multiply to the right
- Step 2- Divide by the bottom number
- Step 3- Make sure to have correct amount of sig figs
P.S. MAKE SURE TO ALWAYS HAVE UNITS!!!!!!!
Practice problems:
You can find the answers on moodle. (:
Other helpful links:
http://www.chem.tamu.edu/class/fyp/mathrev/mr-da.html
http://www.alysion.org/dimensional/fun.htm
Accuracy vs. Precision is a theory used in chemistry, presented by Mrs. Couling. Scientists aim for measurements to be both accurate and precise.
Accuracy: Accuracy refers to the measure of "rightness". By definition, accurate means "capable of providing a correct reading or measurement". A measurement is accurate if it correctly reflects the size of the thing being measured. Accuracy refers to how closely a measured value agrees with the correct value. Accuracy is correctness.
Precision: Precision refers to the measure of "exactness". By definition, precise means "repeatable, reliable, getting the same measurement each time". Precision refers to how closely individual measurements agree with each other. Precision is repeatability.
Note: See the following analogy of measurements to arrows at a target. See that the X's are where the five arrows hit the target.
Accurate AND Precise